Financial Information By Segment & Geographic Area (Revenues From External Customers And Long-Lived Asset Information By Geographic Area) (Details) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2009
Revenues from external customers	$ 3,102		$ 2,716		$ 2,108
Long-lived assets	1,170	[1]	1,083	[1]	1,114	[1]
US [Member]
Revenues from external customers	589		546		332
Long-lived assets	240	[1]	233	[1]	320	[1]
China [Member]
Revenues from external customers	554		458		281
Long-lived assets	280	[1]	210	[1]	201	[1]
Other Foreign Countries [Member]
Revenues from external customers	1,959		1,712		1,495
Long-lived assets	$ 650	[1]	$ 640	[1]	$ 593	[1]

[1] Long-lived assets include total equity and other investments, net property, plant and equipment, net intangible assets and assets held for rent.